"This publication of Treasury's Office of Foreign Assets Control ('OFAC') is designed as a reference tool providing actual notice of actions by OFAC with respect to Specially Designated Nationals [SDN] and other persons (which term includes both individuals and entities) whose property is blocked, to assist the public in complying with the various sanctions programs administered by OFAC. The latest changes to the SDN List may appear here prior to their publication in the Federal Register, and it is intended that users rely on changes indicated in this document. Such changes reflect official actions of OFAC, and will be reflected as soon as practicable in the Federal Register under the index heading 'Foreign Assets Control.' New Federal Register notices with regard to Specially Designated Nationals or blocked persons may be published at any time. Users are advised to check the Federal Register and this electronic publication routinely for additional names or other changes to the SDN List."
U.S. Department of the Treasury: http://www.treasury.gov/